1 Head, Division of Biochemistry, Royal Women's Hospital, Melbourne, Swanston St. Carlton, N.3 Victoria, Australia
As Tsvet, the originator of adsorption chromatography, remarked in 1920: "Although all scientific progress is progress in technic, technic is not uncommonly the weakest part of scientific investigation." Certainly, the experiences of Mr. Ibbott and Dr. O'Brien (Pediatrics, 34: 418, 1964) provide a good illustration of this, and I entirely agree with their conclusions that solvent partition methods for measuring neonatal serum bile pigments are unsatisfactory and that earlier "conclusions on the possible significance of the monoglucuronide are invalid."